diff --git a/.drone.yml b/.drone.yml
index 9cf7c39..b137ecc 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -16,6 +16,7 @@ steps:
 #      - 'bin/console lint:container'
 #      - 'bin/console lint:yaml'
   - name: docker-build
+    # https://github.com/drone/drone-plugin-index/blob/main/plugins/docker/original.md
     image: plugins/docker
     when:
 #      branch: